Journal
ACS NANO
Volume 5, Issue 12, Pages 10047-10054Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn204287g
Keywords
graphene oxide; in situ electron microscopy; self-assembled membrane; drop-casting
Categories
Funding
- NSF [ECCS-0925837, DMR-0955612]
- Alfred P. Sloan Research Foundation
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [0955612] Funding Source: National Science Foundation
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [0925837] Funding Source: National Science Foundation
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Graphene oxide sheets dispersed in water and many other solvents can spontaneously assemble into a surface film covering an evaporating droplet due to their amphiphilicity. Thus, graphene oxide membranes with controllable thickness suspended over an orifice have been directly fabricated using a simple drop-cast approach. Mechanical properties and electron transparency tests of these membranes show their use as electron transparent, but molecularly Impenetrable, windows for environmental electron microscopy In liquids and dense gaseous media. The foreseeable, broader application of this drop-cast window methodology is the creation of access spots for electron probes to study isolated microsamples in their natural, undisrupted state within the interior of prefabricated devices (such as microfluidic chips or sealed containers of biological, chemically reactive, toxic, or forensic materials).
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